2 * QEMU i440FX/PIIX3 PCI Bridge Emulation
4 * Copyright (c) 2006 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
31 typedef uint32_t pci_addr_t;
34 typedef PCIHostState I440FXState;
36 typedef struct PIIX3State {
40 typedef struct PIIX3IrqState {
44 struct PCII440FXState {
46 target_phys_addr_t isa_page_descs[384 / 4];
50 static void i440fx_addr_writel(void* opaque, uint32_t addr, uint32_t val)
52 I440FXState *s = opaque;
56 static uint32_t i440fx_addr_readl(void* opaque, uint32_t addr)
58 I440FXState *s = opaque;
62 static void piix3_set_irq(void *opaque, int irq_num, int level);
64 /* return the global irq number corresponding to a given device irq
65 pin. We could also use the bus number to have a more precise
67 static int pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
70 slot_addend = (pci_dev->devfn >> 3) - 1;
71 return (irq_num + slot_addend) & 3;
74 static int pci_irq_levels[4];
76 static void update_pam(PCII440FXState *d, uint32_t start, uint32_t end, int r)
80 // printf("ISA mapping %08x-0x%08x: %d\n", start, end, r);
84 cpu_register_physical_memory(start, end - start,
88 /* ROM (XXX: not quite correct) */
89 cpu_register_physical_memory(start, end - start,
94 /* XXX: should distinguish read/write cases */
95 for(addr = start; addr < end; addr += 4096) {
96 cpu_register_physical_memory(addr, 4096,
97 d->isa_page_descs[(addr - 0xa0000) >> 12]);
103 static void i440fx_update_memory_mappings(PCII440FXState *d)
106 uint32_t smram, addr;
108 update_pam(d, 0xf0000, 0x100000, (d->dev.config[0x59] >> 4) & 3);
109 for(i = 0; i < 12; i++) {
110 r = (d->dev.config[(i >> 1) + 0x5a] >> ((i & 1) * 4)) & 3;
111 update_pam(d, 0xc0000 + 0x4000 * i, 0xc0000 + 0x4000 * (i + 1), r);
113 smram = d->dev.config[0x72];
114 if ((d->smm_enabled && (smram & 0x08)) || (smram & 0x40)) {
115 cpu_register_physical_memory(0xa0000, 0x20000, 0xa0000);
117 for(addr = 0xa0000; addr < 0xc0000; addr += 4096) {
118 cpu_register_physical_memory(addr, 4096,
119 d->isa_page_descs[(addr - 0xa0000) >> 12]);
124 void i440fx_set_smm(PCII440FXState *d, int val)
127 if (d->smm_enabled != val) {
128 d->smm_enabled = val;
129 i440fx_update_memory_mappings(d);
134 /* XXX: suppress when better memory API. We make the assumption that
135 no device (in particular the VGA) changes the memory mappings in
136 the 0xa0000-0x100000 range */
137 void i440fx_init_memory_mappings(PCII440FXState *d)
140 for(i = 0; i < 96; i++) {
141 d->isa_page_descs[i] = cpu_get_physical_page_desc(0xa0000 + i * 0x1000);
145 static void i440fx_write_config(PCIDevice *dev,
146 uint32_t address, uint32_t val, int len)
148 PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev);
150 /* XXX: implement SMRAM.D_LOCK */
151 pci_default_write_config(dev, address, val, len);
152 if ((address >= 0x59 && address <= 0x5f) || address == 0x72)
153 i440fx_update_memory_mappings(d);
156 static void i440fx_save(QEMUFile* f, void *opaque)
158 PCII440FXState *d = opaque;
161 pci_device_save(&d->dev, f);
162 qemu_put_8s(f, &d->smm_enabled);
164 for (i = 0; i < 4; i++)
165 qemu_put_be32(f, pci_irq_levels[i]);
168 static int i440fx_load(QEMUFile* f, void *opaque, int version_id)
170 PCII440FXState *d = opaque;
175 ret = pci_device_load(&d->dev, f);
178 i440fx_update_memory_mappings(d);
179 qemu_get_8s(f, &d->smm_enabled);
182 for (i = 0; i < 4; i++)
183 pci_irq_levels[i] = qemu_get_be32(f);
188 static int i440fx_pcihost_initfn(SysBusDevice *dev)
190 I440FXState *s = FROM_SYSBUS(I440FXState, dev);
192 register_ioport_write(0xcf8, 4, 4, i440fx_addr_writel, s);
193 register_ioport_read(0xcf8, 4, 4, i440fx_addr_readl, s);
195 register_ioport_write(0xcfc, 4, 1, pci_host_data_writeb, s);
196 register_ioport_write(0xcfc, 4, 2, pci_host_data_writew, s);
197 register_ioport_write(0xcfc, 4, 4, pci_host_data_writel, s);
198 register_ioport_read(0xcfc, 4, 1, pci_host_data_readb, s);
199 register_ioport_read(0xcfc, 4, 2, pci_host_data_readw, s);
200 register_ioport_read(0xcfc, 4, 4, pci_host_data_readl, s);
204 static int i440fx_initfn(PCIDevice *dev)
206 PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev);
208 pci_config_set_vendor_id(d->dev.config, PCI_VENDOR_ID_INTEL);
209 pci_config_set_device_id(d->dev.config, PCI_DEVICE_ID_INTEL_82441);
210 d->dev.config[0x08] = 0x02; // revision
211 pci_config_set_class(d->dev.config, PCI_CLASS_BRIDGE_HOST);
212 d->dev.config[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL; // header_type
214 d->dev.config[0x72] = 0x02; /* SMRAM */
216 register_savevm("I440FX", 0, 2, i440fx_save, i440fx_load, d);
220 static PIIX3State *piix3_dev;
222 PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix3_devfn, qemu_irq *pic)
228 PIIX3IrqState *irq_state = qemu_malloc(sizeof(*irq_state));
230 irq_state->pic = pic;
231 dev = qdev_create(NULL, "i440FX-pcihost");
232 s = FROM_SYSBUS(I440FXState, sysbus_from_qdev(dev));
233 b = pci_register_bus(&s->busdev.qdev, "pci.0",
234 piix3_set_irq, pci_slot_get_pirq, irq_state, 0, 4);
238 d = pci_create_simple(b, 0, "i440FX");
239 *pi440fx_state = DO_UPCAST(PCII440FXState, dev, d);
241 piix3_dev = DO_UPCAST(PIIX3State, dev, pci_create_simple(b, -1, "PIIX3"));
242 *piix3_devfn = piix3_dev->dev.devfn;
247 /* PIIX3 PCI to ISA bridge */
249 static void piix3_set_irq(void *opaque, int irq_num, int level)
251 int i, pic_irq, pic_level;
252 PIIX3IrqState *irq_state = opaque;
254 pci_irq_levels[irq_num] = level;
256 /* now we change the pic irq level according to the piix irq mappings */
258 pic_irq = piix3_dev->dev.config[0x60 + irq_num];
260 /* The pic level is the logical OR of all the PCI irqs mapped
263 for (i = 0; i < 4; i++) {
264 if (pic_irq == piix3_dev->dev.config[0x60 + i])
265 pic_level |= pci_irq_levels[i];
267 qemu_set_irq(irq_state->pic[pic_irq], pic_level);
271 static void piix3_reset(void *opaque)
273 PIIX3State *d = opaque;
274 uint8_t *pci_conf = d->dev.config;
276 pci_conf[0x04] = 0x07; // master, memory and I/O
277 pci_conf[0x05] = 0x00;
278 pci_conf[0x06] = 0x00;
279 pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
280 pci_conf[0x4c] = 0x4d;
281 pci_conf[0x4e] = 0x03;
282 pci_conf[0x4f] = 0x00;
283 pci_conf[0x60] = 0x80;
284 pci_conf[0x61] = 0x80;
285 pci_conf[0x62] = 0x80;
286 pci_conf[0x63] = 0x80;
287 pci_conf[0x69] = 0x02;
288 pci_conf[0x70] = 0x80;
289 pci_conf[0x76] = 0x0c;
290 pci_conf[0x77] = 0x0c;
291 pci_conf[0x78] = 0x02;
292 pci_conf[0x79] = 0x00;
293 pci_conf[0x80] = 0x00;
294 pci_conf[0x82] = 0x00;
295 pci_conf[0xa0] = 0x08;
296 pci_conf[0xa2] = 0x00;
297 pci_conf[0xa3] = 0x00;
298 pci_conf[0xa4] = 0x00;
299 pci_conf[0xa5] = 0x00;
300 pci_conf[0xa6] = 0x00;
301 pci_conf[0xa7] = 0x00;
302 pci_conf[0xa8] = 0x0f;
303 pci_conf[0xaa] = 0x00;
304 pci_conf[0xab] = 0x00;
305 pci_conf[0xac] = 0x00;
306 pci_conf[0xae] = 0x00;
308 memset(pci_irq_levels, 0, sizeof(pci_irq_levels));
311 static void piix_save(QEMUFile* f, void *opaque)
313 PCIDevice *d = opaque;
314 pci_device_save(d, f);
317 static int piix_load(QEMUFile* f, void *opaque, int version_id)
319 PCIDevice *d = opaque;
322 return pci_device_load(d, f);
325 static int piix3_initfn(PCIDevice *dev)
327 PIIX3State *d = DO_UPCAST(PIIX3State, dev, dev);
330 isa_bus_new(&d->dev.qdev);
331 register_savevm("PIIX3", 0, 2, piix_save, piix_load, d);
333 pci_conf = d->dev.config;
334 pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
335 pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371SB_0); // 82371SB PIIX3 PCI-to-ISA bridge (Step A1)
336 pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_ISA);
337 pci_conf[PCI_HEADER_TYPE] =
338 PCI_HEADER_TYPE_NORMAL | PCI_HEADER_TYPE_MULTI_FUNCTION; // header_type = PCI_multifunction, generic
341 qemu_register_reset(piix3_reset, d);
345 static PCIDeviceInfo i440fx_info[] = {
347 .qdev.name = "i440FX",
348 .qdev.desc = "Host bridge",
349 .qdev.size = sizeof(PCII440FXState),
351 .init = i440fx_initfn,
352 .config_write = i440fx_write_config,
354 .qdev.name = "PIIX3",
355 .qdev.desc = "ISA bridge",
356 .qdev.size = sizeof(PIIX3State),
358 .init = piix3_initfn,
364 static SysBusDeviceInfo i440fx_pcihost_info = {
365 .init = i440fx_pcihost_initfn,
366 .qdev.name = "i440FX-pcihost",
367 .qdev.size = sizeof(I440FXState),
371 static void i440fx_register(void)
373 sysbus_register_withprop(&i440fx_pcihost_info);
374 pci_qdev_register_many(i440fx_info);
376 device_init(i440fx_register);